Back in the 70s and 80s I bought a couple of pair of their Ambermatic lens sunglasses. Best hunting and driving glasses ever. They weren't for crap flying (not dark enough, had buy the G15s). My final pair broke and the lens was scratched and they don't make them any more.
I am really bummed.
They come up for sale (used) on eBay. I think my late father had a pair of those long ago. I’ve been very happy with yellow lens sunglasses, they work great, which surprised me.